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Improved corrosion resistance in simulated concrete pore solution of surface nanocrystallized rebar fabricated by wire-brushing
Affiliation:1. College of Mechanics and Materials, Hohai University, Nanjing 210098, PR China;2. School of Materials Science and Engineering, Southeast University, Nanjing 210096, PR China;3. Nantong Ocean and Coastal Engineering Research Institute, Hohai University, Nantong 226000, PR China;1. College of Mechanics and Materials, Hohai University, Nanjing 210098, China;2. Institute of Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China;1. Jiangsu Key Laboratory of Coast Ocean Resources Development and Environment Security, Hohai University, Nanjing 210098, Jiangsu, China;2. School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, Jiangsu, China;3. School of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China;1. Interuniversity Research Institute for Molecular Recognition and Technological Development, Universitat Politècnica de València - Universitat de València, Camino de Vera s/n, 46022 Valencia, Spain;2. Department of Architectural Construction, Universitat Politècnica de València, Camino de Vera s/n, 46022, Valencia, Spain;3. Department of Chemistry, Universitat Politècnica de València, Camino de Vera s/n, 46022, Valencia, Spain;4. Department of Electronic Engineering, Universitat Politècnica de València, Camino de Vera s/n, 46022, Valencia, Spain;1. Chemistry Department, Faculty of Science, Zagazig University, Zagazig 44519, Egypt;2. Chemistry Department, Faculty of Science, Tabuk University, Tabuk, Saudi Arabia;3. Center for Advanced Materials, Qatar University, Doha 2713, Qatar
Abstract:Continuous surface nanocrystallization (SNC) of rebar was achieved through wire-brushing process. A uniform NC layer with thickness of 25 μm and average grain size of 50 nm was formed on the rebar surface. Due to the enhanced passivation performance of the NC layer, corrosion resistance of the SNC rebar was significantly improved in Cl?-containing saturated Ca(OH)2 solution. High-energetic crystal defects of the nano-grains leads to the faster passivation and enhanced stability of the passive film of the SNC rebar.
Keywords:A  Steel reinforced concrete  B  EIS  B  Polarization  C  Passivity  C  Pitting corrosion
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